How many English words can be formed from the word umbrella and could you list them?

Here's a list of English words that can be formed from the letters in "umbrella":

3-letter words:

* ale

* ear

* elm

* ell

* era

* lame

* lea

* lum

* rue

* ule

4-letter words:

* bear

* bell

* blue

* bum

* earl

* lame

* leer

* lube

* male

* meal

* mere

* mule

* ream

* rule

5-letter words:

* amble

* bemused

* blame

* blear

* blee

* blume

* bulge

* ember

* lamely

* lumbar

* ramble

* rebuke

* ruler

6-letter words:

* ramble

* rebuke

* rubble

7-letter words:

* umbrella

Note: This list includes all possible words, including proper nouns and less common words.